IBM 770 manual SMAPI BIOS B-13, Get CPU Information

Get CPU Information
Input Field
Major Function Number -		ðð
Minor Function Number -		ð1
Parameter 1	-	Reserved
Parameter 2	-	Reserved
Parameter 3	-	Reserved
Parameter 4	-	Reserved
Parameter 5	-	Reserved
Output Field
Return Code	-	Error status
Auxiliary Return Code -		Reserved
Parameter 1	-	Reserved
Parameter 2	-	CPU ID
		(Bits 15-8) Microprocessor type
		(Bits 7-ð) Microprocessor stepping level
		= FFFFh : Unknown
Parameter 3	-	Clock Information
		(Bits 15-8) CPU clock (units: MHz)
		= FEh : CPU clock is over 254 MHz
		= FFh : Unknown
		(parameter 4 is valid)
		(Bits 7-ð) Internal clock (units: MHz)
		= FEh : Internal clock is over 254 MHz
		= FFh : Unknown
		(parameter 5 is valid)
Parameter 4	-	(Bits 31-16) Reserved

-(Bits 15-ð) CPU clock (units : MHz)

Parameter 5- (Bits 31-16) Reserved

-(Bits 15-ð) Internal clock (units: MHz)

SMAPI BIOS B-13